Preheat oven to 400 F. Lightly spray a cookie or baking sheet with non-stick cooking spray.
In a small skillet, add the olive oil and saute the chicken breasts with some salt and pepper for 5 to 7 minutes, stirring often, until cooked through. Once cooked through, add the BBQ sauce and coat the chicken well. Stir in the thinly sliced red onion and let simmer in the BBQ sauce for 3-4 minutes.
While the chicken is cooking, split open the French bread and lay open face on the baking sheets. Spread the pizza sauce over the bread, then add the shredded cheeses over both pieces of french loaf. Add the BBQ chicken mixture over the cheese and then bake in the preheated oven for 10 minutes. (If you want to add the BBQ chicken under the cheese, you can do that too!)
Prepare fresh fruit.
Serve BBQ Chicken French Bread Pizza with fruit.